Gellert perfected transfigurating into another person with Albus looking on in delight of his accomplishment. His faultless replica of that expression stays within his memory. Even after that summer's unpleasant end, he continues to transfigure himself into that version of Albus.
Some ideas you can decide to use or disregard, up to any interested writer: - Grindelwald pressing a kiss onto Dumbledore (young or old) while still wearing the latter's face. - getting into trouble he can't magic or charm his way out of, but he still has to be disguised. Looking back at a mirror and seeing the new bruises and bite marks decorating his (Albus') form. - an interaction with Credence while Grindelwald playacts as a young, sympathetic, Dumbledore. - leaving mayhem and Aurors scrambling after a Dark Wizard of a Dangerous Movement. Not a new graduate with twinkling blue eyes who just wants to see the world.
Albus/Gellert and/or Gellert/Others. Dubcon and/or potential noncon. An effigy of a fond memory.
Some ideas you can decide to use or disregard, up to any interested writer:
- Grindelwald pressing a kiss onto Dumbledore (young or old) while still wearing the latter's face.
- getting into trouble he can't magic or charm his way out of, but he still has to be disguised. Looking back at a mirror and seeing the new bruises and bite marks decorating his (Albus') form.
- an interaction with Credence while Grindelwald playacts as a young, sympathetic, Dumbledore.
- leaving mayhem and Aurors scrambling after a Dark Wizard of a Dangerous Movement. Not a new graduate with twinkling blue eyes who just wants to see the world.